Opto ramp switch board
New design of the 3 opto PCB (also referred to as a ramp opto board) used on many Williams WPC pinball machines.
The new design has a number of improvement from the factory original:
- Status LEDs give full diagnostics of each transmitter and receiver!
- Lower current consumption and less heat, for longer life.
- User serviceable with transistors that are replaceable with thru-hole equivalents.
This opto ramp switch board assembly is a substitute for the following part numbers: